Abstract
Abstract Cutless (flurprimidol) effectively reduced shoot elongation of container-grown woody ornamentals, including abelia, cotoneaster, crape myrtle, Foster holly, Mystery gardenia, Manhattan euonymus, photinia and rhododendron. Optimum Cutless 50W (flurprimidol) spray rates were 500–600 ppm for most species except for Manhattan euonymus (1250 ppm), Mystery gardenia and Natchez crape myrtle (750 ppm). Optimum Cutless 0.33G (flurprimidol) granular rates were 0.6 kg/ha (0.5 lb/A) for Coral Beauty cotoneaster and Foster holly, and 1.7 kg/ha (1.5 lb/A) for Fraser photinia. Atrimmec (dikegulac) was effective in controlling growth of abelia at spray rates of 1480 ppm, Coral Beauty cotoneaster, and Manhattan euonymus at 1600 ppm, Foster holly, and Fraser photinia at 4440 ppm. Neither Off-Shoot-O nor Trim-Cut (mefluidide) had a significant effect on any of the species studied. None of the growth regulators had a significant effect on nandina.
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